I had a crazy idea the other day and this is its manifestation. Tell me what you think!

Crazy-ass Baton Pass

Smeargle @ White herb

Own tempo - timid - 218 HP/32 def/32 spd/230 spe

Spore

Shell smash

Baton pass

Ingrain

Pretty self explanatory. Spore, smash, ingrain, pass.

Espeon @ leftovers

Magic bounce - timid - 252 HP/4 spA/252 spe

Baton pass

Stored power

Calm mind

HP fight

Possible receiver with Stored Power, also could pass along calm minds.

Ninjask @ lefties

Speed boost - jolly - 248 HP/224 defense/36 speed

Protect

Baton pass

Substitute

Swords dance

Again, classic set. Passing speed boosts and swords dances.

Vaporeon @ damp rock

Water absorb - calm - 244 HP/136 def/128spe

Rain dance

Baton pass

Wish

Substitute

In theory, he should be the last passer before Dragonite. Rain dance to help Hurricane and Thunder, wish for support and then pass onto D'nite.

Mr mime @ lefties

Soundproof - timid - 252 HP/4 spd/252 spe

Barrier

Baton pass

Nasty plot

Taunt

Some defense for dragonite, and also special attack. Also, taunt can help with phasing or status.

Dragonite @ expert belt

Multiscale - hasty - 76 atk/252 spa/180 spe

Hurricane

Earthquake

Thunder

Superpower

Sweeper! If all goes well, this guy is unstoppable. With nasty plots, swords dances, and speed boosts, nothing really walls this guy.

In theory, this would work well. However I have a really hard time passing everything correctly. Also, only 2 of my Pokemon have attacking moves, which has proved fatal. Is there any way I could condense this chain and add some more possible receivers? I'm not even attached to dragonite, a complete overhaul is definitely in the cards. Thanks!!

Priority moves would make such a long chain nearly impossible. Start a match with your opponent uses Mach Punch or Vacuum Wave and immediately Smeargle is gone. Also each turn you BP, its another free move for your opponent to set up as well, and one forced switch would cause the chain would be broken too.

Swap out dragonite for something else, or change the set so it doesn't rely so heavily on rain. Nidoking is one of the best recipients, lucario is a decent receiver because of his plethora of priority moves, mew has a million moves, etc

Swap the vaporeon set, it doesn't do anything except set up rain

Vaporeon @ Leftovers, 252 HP / 252 SpD / 4 Def Timid

Acid Armor, Wish / Aqua Ring / Substitute, Baton Pass, Scald

I'd drop the nasty plot or the barrier on mr. mime for psychic, there's no reason to run two boosting moves, especially when mr. mime is pretty much only used to stop perish song. Also, smeargle isn't really necessary if you already have espeon; i'd swap him out for scizor or maybe gliscor, or anything with baton and taunt